检索结果-南通市图书馆

亚太经济 2006年第6期 20-23页

作者：吕剑南开大学金融系

本文运用1978-2005年的数据,分别计算了人民币均衡汇率水平和汇率错位程度,并运用两步法和误差修正模型分析了人民币均衡汇率、汇率错位与出口之间的关系。

关键词：人民币均衡汇率汇率错位出口两步法二元模型

Design of Data Model for Urban Transport GIS

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Journal of Geographic Information System 2010年第2期2卷 106-112页

作者： Wen Zeng Xiao-Jie Chang jian-Jun lv 不详

Constructing the data model for public transportation by integrating the spatial and the non-spatial information, is the basis of reasonable plan and effective management of urban public transport. This paper presents a transit data model based on geographic information systems (GIS) technology, which utilizes arc-node networks, and manages the foundational bus data with point, link, polygon and record features. In this model, a transport network is generated and maintained in a dynamic manner, and hence supports planning, construction, management, operation and optimization functions for transit facilities and routes, as well as day-to-day transactions. Public transportation GIS established on this model foundation will remarkably upgrade the construction level and the urban service ability.

关键词： Geographic Information System (GIS) Transit GIS Transit Route Network Data Mode

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东亚国家钉住汇率制度的可持续性研究

亚太经济 2006年第5期 31-34页

作者：吕剑南开大学经济学院金融系

本文运用生存分析法,对东亚9国近60年钉住汇率制度的可持续性进行了实证研究。结果表明,东亚国家维持稳定的钉住汇率制度的总“生存时间”至多为51年,其影响因素主要是国内经济变量,故一国若要实现钉住汇率制度的维持与存续,需要保持相... 详细信息

本文运用生存分析法,对东亚9国近60年钉住汇率制度的可持续性进行了实证研究。结果表明,东亚国家维持稳定的钉住汇率制度的总“生存时间”至多为51年,其影响因素主要是国内经济变量,故一国若要实现钉住汇率制度的维持与存续,需要保持相对较低的物价和利率水平,以及相对较高的货币供给增长率和国内信贷水平。

关键词：生存分析法钉住汇率制度可持续性生存时间

Treatment of 62 Cases of Infantile Diarrhea by Tuina

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Journal of Acupuncture and Tuina Science 2009年第3期7卷 163-165页

作者：吕建中程波韩丑萍 The Rehabilitation Department Chongqing Three-Gorge Central Hospital

Objective： To observe the clinical efficacy oftuina on infantile diarrhea. Method： Sixty-two cases were classified into five subtypes： diarrhea due to food injury, wind-cold, damp-heat, spleen deficiency and yang deficiency of the spleen and kidney. The manipulations including separating hand yin-yang, kneading the general tendon, pushing spleen-earth, transporting external Bagua, rubbing the abdomen, pressing Zusanli （ST 36）, kneading Guiwei and pinching the spine were applied once a day. Result： After the treatments of 3 to 30, 35 cases got recovery, 21 got marked effect, and 6 got improvement. Conclusion： The infantile tuina treatment is effective for infantile diarrhea.

关键词： Diarrhea, Infantile Syndrome Differentiation Treatment Tuina Massage

Fullerene-derived boron-doped defective nanocarbon for highly selective H_(2)O_(2) electrosynthesis

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Nano Research 2024年第3期17卷 1217-1224页

作者： Wangqiang Shen Chang Zhang Muneerah Alomar Zhiling Du Zepeng Yang Junjie Wang Guangqing Xu jian Zhang Jun lv Xing Lu School of Materials Science and Engineering Hefei University of TechnologyHefei 230009China School of Energy and Environmental Hebei University of EngineeringHandan 056038China School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Department of Physics College of SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh 11671Saudi Arabia

Electrochemical production of hydrogen peroxide(H_(2)O_(2))via the two-electron(2e-)pathway of oxygen reduction reaction(ORR)supplies an auspicious alternative to the current industrial anthraquinone ***,it still lacks efficient electrocatalysts to achieve high ORR activity together with 2e-selectivity ***,a boron-doped defective nanocarbon(B-DC)electrocatalyst is synthesized by using fullerene frameworks as the precursor and boric oxide as the boron *** obtained B-DC materials have a hierarchical porous structure,befitting boron dopants,and abundant topological pentagon defects,exhibiting a high ORR onset potential of 0.78 V and a dominated 2e-selectivity(over 95%).Remarkably,when B-DC electrocatalyst is employed in a real device,it achieves a high H_(2)O_(2) yield rate(247 mg·L^(-1)·h^(-1)),quantitative Faraday efficiency(~100%),and ultrafast organic pollutant degradation *** theoretical calculation reveals that the synergistic effect of topological pentagon defects and the incorporation of boron dopants promote the activation of the O_(2) molecule and facilitates the desorption of oxygen *** finding will be very helpful for the comprehension of the synergistic effect of topological defects and heteroatom dopants for boosting the electrocatalytic performance of nanocarbon toward H_(2)O_(2) production.

关键词： fullerene electrochemical hydrogen peroxide production oxygen reduction reaction carbon nanomaterials

Clinical outcomes of sacral neuromodulation in non-neurogenic,non-obstructive dysuria:A 5-year retrospective,multicentre study in China

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World Journal of Clinical Cases 2020年第12期8卷 2494-2501页

作者： Ling-Feng Meng Wei Zhang jian-Ye Wang Yao-Guang Zhang Peng Zhang Li-Min Liao jian-Wei lv Qing Ling Zhong-Qing Wei Tie Zhong Zhi-Hui Xu Wei Wen Jia-Yi Li De-Yi Luo Department of Urology Beijing HospitalNational Center of GerontologyBeijing 100730China Department of Urology Beijing Chaoyang HospitalInstitute of UrologyCapital Medical UniversityBeijing 100000China Department of Urology China Rehabilitation Research CentreRehabilitation School of Capital Medical UniversityBeijing 100000China Department of Urology South CampusRenji HospitalShanghai Jiao Tong University School of MedicineShanghai 200000China Department of Urology Tongji HospitalHuazhong University of Science and TechnologyWuhan 430000Hubei ProvinceChina Department of Urology The Second Affiliated Hospital of Nanjing Medical UniversityNanjing 210000Jiangsu ProvinceChina Department of Urology The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’an 710000Shaanxi ProvinceChina Department of Urology Zhejiang Provincial People’s HospitalHangzhou 310000Zhejiang ProvinceChina Department of Urology Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200000China Department of Urology Renji HospitalShanghai Jiao Tong University School of MedicineShanghai 200000China Department of Urology West China HospitalSichuan UniversityChengdu 610000Sichuan ProvinceChina

BACKGROUND Management of non-neurogenic,non-obstructive dysuria represents one of the most challenging dilemmas in urological *** main clinical symptom is the increase in residual *** dysfunction is the main cause of dysuria or urinary retention,mainly due to the decrease in bladder contraction(the decrease in contraction amplitude or duration)or the increase in outflow tract *** neuromodulation(SNM)has been used for>10 years to treat many kinds of lower urinary tract *** has become increasingly popular in China in recent ***,studies focusing on nonneurogenic,non-obstructive dysuria patients treated by SNM are highly *** To assess the outcome of two-stage SNM in non-neurogenic,non-obstructive *** Clinical data of 54 patients(26 men,28 women)with non-neurogenic,nonobstructive dysuria treated by SNM from January 2012 to December 2016 in ten medical centers in China were retrospectively *** patients received two or more conservative *** voiding diary,urgency score,and quality of life score before operation,after implantation of tined lead in stage I(test period),and during short-term follow-up(latest follow-up)after implantation of the implanted pulse generator in stage II were compared to observe symptom *** Among the 54 study patients,eight refused to implant an implanted pulse generator because of the unsatisfactory effect,and 46 chose to embed the implanted pulse generator at the end of stage *** conversion rate of stage I to stage II was 85.2%.The average follow-up time was 18.6 *** were significant differences between baseline(before stage I)and the test period(after stage I)in residual urine,voiding frequency,average voiding amount,maximum voiding amount,nocturia,urgency score,and quality of life *** residual urine and urgency score between the test period and the latest follow-up time(after stage II)were also significantly different

关键词： Dysuria Implanted pulse generator Non-neurogenic Non-obstructive Sacral neuromodulation

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卫星编队飞行姿态协同输出反馈控制(英文)

宇航学报 2010年第12期31卷 2691-2696页

作者：吕建婷高岱黑龙江大学数学科学学院哈尔滨150080 哈尔滨工业大学卫星技术研究所哈尔滨150001

研究了双星编队飞行系统的姿态协同控制问题。首先考虑在角速度不可测情况下,给出一种分布式姿态协同输出反馈控制方案,并通过李亚普诺夫方法证明了编队飞行系统全局渐近稳定性。然后在控制输入饱和时给出了另一种输出反馈控制方案。通... 详细信息

研究了双星编队飞行系统的姿态协同控制问题。首先考虑在角速度不可测情况下,给出一种分布式姿态协同输出反馈控制方案,并通过李亚普诺夫方法证明了编队飞行系统全局渐近稳定性。然后在控制输入饱和时给出了另一种输出反馈控制方案。通过在控制方案中引入双曲正切饱和函数,得出只需控制参数的选取满足某一限制条件,就能有效地抑制控制力矩的饱和。最后对给出的算法进行了数学仿真。结果表明,所设计的控制算法是可行的、有效的。

关键词：卫星编队飞行姿态控制输出反馈控制输入饱和

一种基于不变量的从工作流网到PERT图的转换方法

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电子学报 2008年第5期36卷 893-898页

作者：葛季栋胡昊吕建计算机软件新技术国家重点实验室(南京大学) 南京大学计算机科学与技术系江苏南京210093 南京大学软件学院江苏南京210093

工作流管理系统为现代企业提供了一种协同工作环境,可以管理企业的业务过程,并提高企业的商业竞争能力.为了有效管理业务过程的进度,需要提供一种基于工作流过程模型的进度估算方法.基于Petri网的工作流网模型难以直接估算工作流过程模... 详细信息

工作流管理系统为现代企业提供了一种协同工作环境,可以管理企业的业务过程,并提高企业的商业竞争能力.为了有效管理业务过程的进度,需要提供一种基于工作流过程模型的进度估算方法.基于Petri网的工作流网模型难以直接估算工作流过程模型的进度与工期,而在传统的项目进度计划中,PERT图是一种成熟的技术,为此,本文在工作流网的基础上增加了时间的概念,基于LMST-不变量的分解技术,提出了一种将LMST-不变量分解得到的子网转换为PERT图的算法,由此达到估算工作流过程模型的进度与工期的目的.

关键词：工作流 Petri网过程建模合理性不变量 PERT图

Preparative isolation of Heteroclitin D from Kadsurae Caulis using normal-phase flash chromatography

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Journal of Pharmaceutical Analysis 2013年第6期3卷 456-459页

作者： Xiao-Xue Yu Qian-Wen Wang Xin-Jun Xu Wei-jian lv Ming-Qian Zhao Zhi-Kun Liang School of Pharmaceutical Sciences Sun Yat-Sen University Guangdong Technology Research Center for Advanced Chinese Medicine

Heteroclitin D （H.D） was successfully isolated from Kadsurae Caulis by using flash chromatography and recrystalllzed by methanol, 10.2 mg of H.D was obtained from 4.86 g of crude extract, and the purity determined by HPLC was 99.4%. The structure was identified by UV, IR, MS, and NMR analysis. The fast, simple and efficient method can be applied to the preparation of reference substance of H. D.

关键词： Kadsurae Caulis Heteroclitin D Normal-phase flashchromatography

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中国经济增长与环境污染关系的空间计量分析

财贸研究 2011年第4期22卷 1-7页

作者：吕健上海金融学院经济系上海201209

通过空间计量分析方法,实证中国内地31个省域经济增长与环境污染之间的关系,结果表明:省域经济增长存在全局空间自相关和局部空间自相关;废渣污染的减少可以在较大程度上推动经济增长,且这种作用逐年增强;废气污染大的工业对经济增长的... 详细信息

通过空间计量分析方法,实证中国内地31个省域经济增长与环境污染之间的关系,结果表明:省域经济增长存在全局空间自相关和局部空间自相关;废渣污染的减少可以在较大程度上推动经济增长,且这种作用逐年增强;废气污染大的工业对经济增长的贡献较大,并有不断增加的趋势;废水污染大的工业对经济增长的贡献不显著,说明经济增长摆脱了对其的依赖。另外,在实证中还发现,与空间计量模型相比,普通回归模型由于忽略了空间因素,低估了环境污染对经济增长的影响作用。

关键词：经济增长环境污染空间自相关空间计量模型